How to get remote HD size for c:\

Question

Looking for a way to remotely grab the HD size of a machine on the network. Here is what I'm trying but it isn't working.

My method works for pulling everything else I need but getting hd size i am not having any luck.

string hdSize = GetNetScan("Win32_DiskDrive", "DeviceID=\"c:\"", un, pass, oc1, oc2, oc3, oc4);


public static string GetNetScan(string strTable, string strProps, string un, string pass, byte oc1, byte oc2, byte oc3, byte oc4)
        {
            try
            {
                ConnectionOptions options = new ConnectionOptions();
                options.Username = un;
                options.Password = pass;
                options.EnablePrivileges = true;
                options.Impersonation = ImpersonationLevel.Impersonate;
                ManagementScope scope;
                scope = new ManagementScope("\\\\" + oc1 + "." + oc2 + "." + oc3 + "." + oc4 + "\\root\\cimv2", options);
                scope.Connect();
                String queryString = "SELECT " + strProps + " FROM " + strTable + "";
                ObjectQuery query;
                query = new ObjectQuery(queryString);

                ManagementObjectSearcher objOS = new ManagementObjectSearcher(scope, query);
                string strInfo = string.Empty;
                foreach (ManagementObject MO in objOS.Get())
                    foreach (PropertyData pd in MO.Properties)
                        strInfo += pd.Value + ",";
                return strInfo.Substring(0, strInfo.Length - 1);
            }
            catch (Exception exc)
            {
            }
            return "na";
        }